Google Inc.

Motorola Mobility LLC

Pierre Muratory

Krishna K Bellamkonda

Nischal Patel

John P Boos

Gregory M Agami

Yun H Kim

Stephane Torres

Christophe Durand

Stéphane Torres

Mathiew Durand

Methods and apparatus for determining a transmit antenna gain and a spatial mode of a wireless device () are disclosed. The apparatus () includes a main receive antenna () associated with a first receive signal strength, a diversity receive antenna () associated with a second receive signal strength, and a transmit antenna (). Each of the antennas (, and) is operatively coupled to a controller (). The controller () determines (i) a difference between the first receive signal strength and the second receive signal strength, (ii) a correction factor based on the difference, and (iii) the transmit antenna gain based on the correction factor. In addition, the difference between the first receive signal strength and the second receive signal strength may be used, along with other sensor data (e.g., accelerometer), to estimate the spatial mode (e.g., orientation and hand grip) of the device (). This spatial mode estimation may be then be used, among other things, to more accurately determine transmit antenna gain.

Methods and apparatus for determining a transmit antenna gain and a spatial mode of a device

A method and user device are for communicating data from the user device by transmitting a synchronizing preamble having no timing advance, the synchronizing preamble comprising a base sequence that has been cyclically shifted by N shift index durations. The user device receives from a network station a response that indicates that a preamble was received from the user device having the base sequence cyclically shifted by N&#x2212;1 shift index durations. The user device determines, based at least partially on the response, that corrective action is appropriate. The user device performs one of transmitting a modified form of synchronizing preamble, transmitting the data as a data message having a timing advance, and barring further attempts to transmit the data to the network station for a defined duration.

Apparatus and method for data message communication

Growing community of inventors

Tournefeuille, France

Pierre Muratory